Lub luag haujlwm tseem ceeb ntawm HPMC hauv cov khoom sib xyaw ntub dej feem ntau muaj peb yam hauv qab no:
1. HPMC muaj peev xwm tuav tau dej zoo heev.
2. Kev cuam tshuam ntawm HPMC ntawm qhov sib xws thiab thixotropy ntawm cov tshuaj khib nyiab ntub dej.
3. Kev sib cuam tshuam ntawm HPMC thiab cement.
Kev tuav dej yog ib qho tseem ceeb ntawm HPMC, thiab nws kuj yog ib qho kev ua tau zoo uas ntau cov tuam txhab ntub dej sib xyaw ua ke tau saib xyuas.
Cov dej tuav cov nyhuv ntawm HPMC nyob ntawm qhov nqus dej ntawm lub hauv paus txheej, muaj pes tsawg leeg ntawm mortar, txheej thickness ntawm lub mortar, cov dej xav tau ntawm cov mortar, thiab lub sij hawm teem ntawm cov khoom siv.
HPMC - kev tuav dej
Qhov siab dua qhov kub ntawm HPMC, qhov dej tuav tau zoo dua.
Cov yam ntxwv cuam tshuam rau cov dej khaws cia ntawm cov khib nyiab ntub dej yog HPMC viscosity, ntxiv tus nqi, particle fineness thiab siv kub.
Viscosity yog qhov tseem ceeb rau kev ua haujlwm ntawm HPMC. Rau tib yam khoom, cov viscosity tau ntsuas los ntawm ntau txoj kev sib txawv heev, thiab qee qhov sib txawv ob npaug. Yog li ntawd, thaum sib piv viscosities, nws yuav tsum tau ua ntawm tib txoj kev sim, nrog rau qhov kub thiab txias, spindle, thiab lwm yam. Feem ntau hais lus, qhov siab dua qhov viscosity, qhov zoo dua cov dej tuav cov nyhuv.
Txawm li cas los xij, qhov siab dua qhov viscosity thiab loj dua qhov hnyav molecular ntawm HPMC, qhov sib piv ntawm nws cov solubility yuav muaj kev cuam tshuam tsis zoo rau lub zog thiab kev tsim kho ntawm mortar. Qhov siab dua qhov viscosity, qhov pom tseeb dua cov nyhuv ntawm cov tshuaj khib nyiab, tab sis tsis proportional. Qhov siab dua qhov viscosity, qhov viscous ntau dua ntawm cov khib nyiab ntub dej, uas qhia tau tias muaj cov nplaum nplaum rau lub scraper thaum tsim kho thiab siab adhesion rau lub substrate. Txawm li cas los xij, HPMC muaj kev cuam tshuam me ntsis rau kev txhim kho lub zog ntawm cov mortar ntub nws tus kheej, qhia tias qhov kev ua tau zoo los tiv thaiv tsis pom tseeb. Ntawm qhov tsis sib xws, qee qhov hloov kho HPMC nrog nruab nrab thiab qis viscosity yog qhov zoo tshaj plaws hauv kev txhim kho lub zog ntawm cov mortar ntub dej.
Qhov zoo ntawm HPMC kuj muaj qee yam cuam tshuam rau nws cov dej tuav. Feem ntau hais lus, rau HPMC nrog tib viscosity tab sis sib txawv fineness, lub finer lub HPMC, qhov zoo dua cov dej tuav nyhuv nyob rau hauv tib qhov sib ntxiv.
Post lub sij hawm: Jun-15-2023